US Bridges

156th ST West over Unknown Stream

Good

Hamilton County, Indiana · 01.67 E of SR 421 · Structure no. 2900335

Built
2014
11 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
310
2019 count
Owner
County
County Highway Agency

About this bridge

156th ST West over Unknown Stream is a concrete culvert carrying 156th ST West over Unknown Stream in Hamilton County, Indiana. It was built in 2014, so it is 11 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 310 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2039. The structure is 22 ft (6.7 m) long and 32 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
Carries156th ST West
CrossesUnknown Stream
Location01.67 E of SR 421
RouteCounty Highway 0
CountyHamilton County
StateIndiana
Coordinates40.01329, -86.24028
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.6 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2019)
Projected traffic500 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 156th ST West over Unknown Stream built?

It was built in 2014, making it 11 years old in 2025.

What condition is 156th ST West over Unknown Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does 156th ST West over Unknown Stream carry?

About 310 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is 156th ST West over Unknown Stream?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns 156th ST West over Unknown Stream?

It is owned by the County Highway Agency.